Season 2, Episode 17 - House of Dead-Ends/House of Webs

Jerome informs Mara of his father's mission and tells her that his dad wants him to find a special gem in a suit of armor. When Nina enters the tunnel, she finds a lever and pulls it to open the next door in the tunnels. Back by the entrance, the wall folds in on itself and leads deeper into the tunnels. The kids arrive at their next challenge: a giant spider web. While searching the kids' rooms, Vera gets a hold of the extra amulet hidden in the dollhouse. While Nina, Fabian, Alfie, and Amber are down in the tunnels, Eddie and Patricia perform chores for Victor. Mara tells Jerome that the armor is hidden in Mr. Sweet's office. Jerome inadvertently convinces Alfie to create a distraction to lure Mr. Sweet out of his office by letting a goose through the hallway. While searching for the gem, Jerome accidentally causes the armor to fall and hears Mr. Sweet coming back to his office.